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An aged person is having difficulty in s...

An aged person is having difficulty in seeing nearby objects clearly. Name this defect of vision.

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Presbyopia.
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ZEN PUBLICATION-THE HUMAN EYE AND THE COLOURFUL WORLD-ZEN ADDITIONAL QUESTIONS SECTION - VERY SHORT ANSWER TYPE QUESTIONS
  1. Which eye defect can be corrected using (i) convex lens and (ii) conca...

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  2. Where is the image formed if a person is suffering from (i) myopia and...

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  3. An aged person is having difficulty in seeing nearby objects clearly. ...

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  4. Bifocal lenses are used to correct which defect of vision ?

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  5. Observe the given figure. Name the eye defect indicated in the figure ...

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  6. Shilpa is using spectacles. Is she eligible to pledge to donate her ey...

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  7. What is disporsion of light? Mention the colour that bonds the least a...

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  8. Name the colours that constitute white light in the order of increasin...

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  9. List the colours observed in a spectrum through a prism in the increas...

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  10. Light of two colours A and B passes through a prism. A deviates more t...

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  11. Mention one difference between refraction in a prism and a glass slab.

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  12. A glass prism produces a spectrum when white light passes through it b...

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  13. Why is the path of sunlight visible when it passes through the canopy ...

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  14. Why is it dangerous to drive on a foggy day ?

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  15. Name the colours of spectrum which respectively have (a) maximum wavel...

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  16. Why does disperson occur only on refraction and not on reflection ?

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  17. How does the sky appear from the surface of the moon ?

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  18. What is the reason for atmospheric refraction ?

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  19. On what factor does the colour of the scattered light depend ?

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  20. How does atmospheric refraction affect the duration of the day on the ...

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